4 Chapter 4: Beginning the Analysis: Investigating System Requirements Systems Analysis and Design in a Changing World, 3rd Edition 4 Learning Objectives Describe the activities of the systems analysis life cycle phase Explain the effect of business process reengineering on activities of the analysis phase Describe the difference between functional and nonfunctional system requirements Identify and understand the different types of users who will be involved in investigating system requirements Systems Analysis and Design in a Changing World, 3rd Edition 2 4 Learning Objectives (continued) Describe the kind of information that is required to develop system requirements Determine system requirements through review of documentation, interviews, observation, prototypes, questionnaires, vendor research, and joint application design sessions Discuss the need for validation of system requirements to ensure accuracy and completeness and the use of a structured walkthrough Systems Analysis and Design in a Changing World, 3rd Edition 3 4 Overview Analysis phase of SDLC skills needed: Fact-finding for investigation of system requirements Analyst should learn details of business processes and daily operations Analyst should become as knowledgeable as business domain users to build credibility Analyst brings fresh perspective to problem Modeling of business processes based on system requirements Systems Analysis and Design in a Changing World, 3rd Edition 4 4 The Analysis Phase in More Detail Gather information Define system requirements Logical model and physical model Prioritize requirements Prototype for feasibility and discovery Generate and evaluate alternatives Review recommendations with management Systems Analysis and Design in a Changing World, 3rd Edition 5 4 The Activities of the Analysis Phase Systems Analysis and Design in a Changing World, 3rd Edition 6 Activities of the Analysis Phase and Their Key Questions Systems An